/Engine/Plugins/MovieScene/LevelSequenceEditor/Source/LevelSequenceEditor/Public/FilmOverlayToolkit.h
Register a toggleable film overlay
static void RegisterToggleableFilmOverlay ( const [FName](API\Runtime\Core\UObject\FName) & FilmOverlayName, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IFilmOverlay](API\Plugins\LevelSequenceEditor\IFilmOverlay) > FilmOverlay )